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harina [27]
3 years ago
6

A rock is thrown upwards with in total velocity of 75 ft/s from a height of 225 feet. The height h of the rock above the ground

t seconds after being released is given by h(t)=-16tt^2+75+225. Determine the time in seconds required for the rock to reach its maximum height. Round your answer to three decimal places.
Mathematics
1 answer:
vaieri [72.5K]3 years ago
4 0

Answer:

it would take 33 5.5 s to reach it's maximum height

Step-by-step explanation:

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Apply the commutative property to 13 x 7 x 21 to rearrange the terms and still get the same solution.
Mumz [18]
Answer is D. 21 x 7 x 13

<span>commutative property: </span>changing order of the numbers
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3 years ago
Read 2 more answers
Arial says that, for any pair of linear relations, if the coefficients of the y-terms are equal and the coefficients of the x-te
wel

Answer:

<h3>a. Give an example for which Arial's claim is true.</h3>

If linear relations have equal coefficient about the independent variable, then those linear relations are parallel. For example, y=3x+4 and y=3x-5.

Notice that the coefficient of the dependent variable must be also equal, otherwise it would change the slope of the expression and they wouldn't be parallel.

<h3>b. Give an example for which Arial's claim is false. </h3>

The statement is not false.

<h3>c. Suggest an improvement to Arial's claim.</h3>

An improvemente would be that the constant term no need to be equal too, between linear relations, because they can be at "differecent heights", sort of speak.

4 0
4 years ago
How can areas of composite 2-D figures be found using simple 2-D shapes?
tino4ka555 [31]

Answer:

hmm length x breadth... I'd simple formula

6 0
3 years ago
A slug takes 4.25 minutes to travel 11.2 centimeters. What is the speed of the slug in meters per second?
MAXImum [283]

Answer:

4.39*10^{-4}\ m/sec

Step-by-step explanation:

Remember that

1\ m=100\ cm

1\ min=60\ sec

The speed is equal to divide the distance by the time

Convert the units

4.25\ min=4.25(60)=255\ sec

11.2\ cm=11.2/100=0.112\ m

so

0.112/255=0.000439\ m/sec

4.39*10^{-4}\ m/sec

5 0
3 years ago
4:■ =8 :14 fhjyghjhgj
andreev551 [17]

Answer:

■ = 7

Explanation:

Because there two ratios are proportional as a result of being equal.

To find the missing part of the ratio, cross multiply, and solve for ■ by converting them into their equivilent fractions.

i.e a : b = a/b.

So 4 : ■ becomes 4/■. And 8 : 14 becomes 8/14.

i.e a/b = c/d → b × c = a × d → bc = ad

Now 4/■ = 8/14 → ■ × 8 = 14 × 4 → 8■ = 56.

8■/8 = 56/8

1■ = 7

■ = 7

This method works for a missing part pretty much anywhere.

____________________

This is a little faster for ratios:

To find the value of the unknown part of the ratio,

just find the factor between two corresponding numbers, and apply that to the known number corresponding to the unknown part.

4 : ■ = 8 : 14

Notice that 4 corresponds to 8

So the factor between these is 2.

Since from 8 to 4 is a multiple of 1/2. 8 × 1/2 = 4, and 14 × 1/2 = ■.

Therefore ■ = 14 × 1/2 = 14/2 = 7

4 0
3 years ago
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